Czechman,
Thanks for the quick reply. I have a small area next to my shop that is just about as big as your blasting area. Your picture gives me an idea. I wonder if I might be able to make a 3 wall box with PVC and then drape tarp over it. I should be able to capture most of the media that way. It does look like you are able to contain most of it even without side walls.
What do you use to sift it before reuse and how many times do you think that you can reuse it before it either breaks down or clogs up with dust?